Re: List of Web Browsers For All Operating Systems

Posted on 2021-04-29, 13:04

by

by RayeR

in Release Announcements

in Release Announcements

So VC redist is just cosmetic update. Ah, OneCoreAPI again, we would need some recent build, I think it's still under development but maybe not fully disclosed (maybe other non-public repo than github) due to licensing issues...

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Re: List of Web Browsers For All Operating Systems

Posted on 2021-04-29, 01:05

by

by RayeR

in Release Announcements

in Release Announcements

DosFreak wrote on 2021-04-28, 23:55: For XP and browsers compiled with VS 2015-2019 the latest VC++ 2019 redist for XP is v14.28.29213.0 Does it help in any meaning for browsers that are not XP compatible (compiled in new MSVC without compatability mode)?

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Re: How to install Windows 98SE on a modern PC

Posted on 2021-04-21, 14:20

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Japhet's programs are placed on GitHub, there's quite recent version of HimemX that can utilize memory beyond 4GB boundary (by switching to long mode and back) https://github.com/Baron-von-Riedesel

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Re: IBM 486SLC/2 Mega Thread (was Weird idea: 83mhz overdrive for 386 sx.)

Posted on 2021-04-14, 15:34

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a POST card (even I had built one myself many years ago) but it didn't received any code in both cases (i386SX on upgrade module and IBM 386SLC on 386SX MB). Of course I tried to remove FPU from module socket and I tried to test it in 386SX MB, as I posted before it was recognized by Norton …

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Re: Yamaha YMF7x4 Guide

Posted on 2021-04-14, 11:55

by

by RayeR

in Marvin \ Sound

in Marvin \ Sound

Hi, i've got a laptop with 754. In Audio Mixer i've got a 3D Wide regulator. What is it and why it is turned off by default? It's some king of DSP effect that should try to enhance stereo effect but I would call it rather sound crippling so it's better to have it disabled, at least for listnening …

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Re: IBM 486SLC/2 Mega Thread (was Weird idea: 83mhz overdrive for 386 sx.)

Posted on 2021-04-14, 11:52

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I agree it may be cache flush signal. The FPGA decode bus DMA cycles and generate it. But is there any reason why it even shouldn't POST with this flush signal unconnected? I also think that 386SX should work on the module if other pins are same. Voltages as I told before are all 5V here, no …

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Re: Evergreen 486 SuperChip - settings for DIP switch?

Posted on 2021-04-10, 23:46

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm in the process of upgrading my 5 general use home computers from XP POS2009 to Linux. There are two desktops in the office (one Mac Pro 2,1, one Operton 185), two laptops (T61, X201), and my garage/mechanic desktop (Prescott 3.8 GHz P4 640 I think). It was the Windows source code leak which …

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Re: IBM 486SLC/2 Mega Thread (was Weird idea: 83mhz overdrive for 386 sx.)

Posted on 2021-04-09, 14:36

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

do we know with any certainty that its pinout is different from Cyrixes SLC? I'm pretty sure they are not 100% identical. According my table you can see differences of pins that have internal pull ups. This pull ups can be measured with DMM between IO pin and VCC pin and I see value about 18.5kohm …

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Re: NeoMagic MagicMedia 256AV question

Posted on 2021-04-09, 14:27

by

by RayeR

in Marvin \ Video

in Marvin \ Video

BTW did MagicMedia256AV have VBE 2.0 or 1.2 only? In case of 1.2 did UniVBE work with it to bring 2.0 support?

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Re: IBM 486SLC/2 Mega Thread (was Weird idea: 83mhz overdrive for 386 sx.)

Posted on 2021-04-09, 00:20

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here's photo of the upgrade module with IBM CPU before I swapped it by intel http://rayer.g6.cz/hardware/suntac.286/slcnow1.jpg

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Re: IBM 486SLC/2 Mega Thread (was Weird idea: 83mhz overdrive for 386 sx.)

Posted on 2021-04-08, 20:11

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

No, the original module had IBM CPU but I have suspection, that the module is damaged. So I desoldered IBM CPU and tried to test it in 386SX board. Also I soldered working intel 386SX CPU on the upgrade module but it doesn't work either.

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Re: IBM 486SLC/2 Mega Thread (was Weird idea: 83mhz overdrive for 386 sx.)

Posted on 2021-04-08, 16:00

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

>furan Here's photo of my upgrade module http://rayer.g6.cz/hardware/suntac.286/mb286d.jpg As you can see VR1 is missing and the CPU is routed directly to 5V. On the photo is intel 386SX soldered on because of testing, I don't have a photo of IBM chip right now but I can take and post it tonight... …

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Re: IBM 486SLC/2 Mega Thread (was Weird idea: 83mhz overdrive for 386 sx.)

Posted on 2021-04-08, 11:10

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I’m not sure what you missed, but it’s a 3.6 v part with 5v tolerant IO. Please can you post some source of this information? And if it is valid exactly for CPU IBM marked "33G0275" ? There are no any detailed informations. If it is true then Kingston violated the specification and fed the chip …

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Re: IBM 486SLC/2 Mega Thread (was Weird idea: 83mhz overdrive for 386 sx.)

Posted on 2021-04-08, 01:47

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK, anybody found IBM SLC datasheet? But regardless some pinout differences on the upgrade module those extra pins was left floating except pin 43 so I think there should be good chance to make it working in 386SX board. Why do you think it may be 3,3V part? The voltage regulator is not populated on …

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Re: IBM 486SLC/2 Mega Thread (was Weird idea: 83mhz overdrive for 386 sx.)

Posted on 2021-04-07, 05:08

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I measured the "NC" pins on IBM 386SLC and found there are differences compared to Cyrix datasheet. Interesting is that on SLC/Now! upgrade module there is only pin 43 connected to FPGA and others are NC, see table at bottom of page http://rayer.g6.cz/hardware/sunta286.htm#386SLC_PINS

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Re: IBM 486SLC/2 Mega Thread (was Weird idea: 83mhz overdrive for 386 sx.)

Posted on 2021-04-06, 19:22

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, what is the current status of this project? Did you managed to replace 386SX by 386/486SLC? I'm a bit confused of ambiguous informations readed aroud it is or not pin2pin compatible. I just made an experiment of replacing intel 386SX-20 by IBM 386SLC on one MB and it didn't even POST. I did it …

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Re: HWiNFO for DOS resurrected !

Posted on 2021-04-06, 14:26

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I had some issues recently with my hardware designs and I had to write my own program to report back the keyboard controller version. BTW it's interesting about AMI BIOS checksum. I never modded such old BIOS and for newer (Pentium+ era) was tools that recalculated it. I wouldn't expect anything …

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Re: List of open-source PC hardware projects

Posted on 2021-04-06, 13:26

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

eMMCs are mostly used as internal storage of mobile phones. Similar to SD cards theirs quality depens widely on manufacturer but generally should be better...

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Re: Kingston SLC Now questions - QFP or PGA?

Posted on 2021-04-06, 12:24

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Aha, I though they are pin2pin compatible. I couldn't find IBM datasheet I found only Cyrix486SLC datasheet. I'll check the difference to 386SX... But opposite, when SLC is replaced by SX it should work?

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Re: Kingston SLC Now questions - QFP or PGA?

Posted on 2021-04-06, 04:20

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, I grab one 386SX MB and swapped the CPU to test the IBM 386SLC and the MB was dead then, no POST. I swapped back original intel 386SX-20 and MB booted again. Also the ULSI FPU behaved weird. It was detected by sysinfo and HWinfo but Ndiags failed all FPU test and also Dos Navigator crashed at …

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